Electrical socket-fitting.



W. F.v ANKLAIVI.

ELECTRICAL-SOCKET FITTING. APPucATloN FILED APR. la, seu.

Patented Apr. 30,1918.

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To all lwhom t may concern:

Be it known that l, mman lB. humeur., a citizen of the United Stat of erica, residing at Detroit, in the county of Wayne and State of Michigan, haveinvented 'certain new and useful Improvements in lEleetrical Socket-Fittings, -of which the following is a specication, reference beinghad therein to the accompan wings.

The invention relates to electrical socket ttings such as" are used for connmting the v novel i throg the htting;

.. Fig. 3 is'a similar view .of another m incandescent lamps of a vehicle lighting syst andthe invention comprisescertain features of construction hereinafter set forth.A f

chiamatemi sation Fig. 2 iS a. Similar inlew `sham, Il hed construction; and

ln the pent stateof the art, sochet httings .for small incandescent l`lamps' are usually provided with a i* ent,

' trai contact," *whichl es the double clamp for'holdthe n the contact it is usual to forma s w function of an electrical cochfonand a Y fr o gagement. ltoprovidefor -teyi i to which the al'-'wires are attached.

This is obgiectionable because ofle low volti mglor nl i mi um at the presentconsilrlltonfmmf a w i and the resi a i i introduced. by the sliding contact frequently produces va dickerg of the light. lt is the object rigid and good `electrical connection between the teral wire andthe' tl contact,

and at the same time to provide for therev Silnt yielding of the la, 'i

contact and si'mlderingY the .i l the e Etherein. l lhe contact member is la v is he -pin on the lampbulb, and

vcentra contact member-. Instead/off revida `la.'connection between this con.- tact. and th terminal wireD a' rigid connection is for'ined bycenty. bo

portion of A also counterboredto receive a ortion li of ,y the insulati` so as to form-a n om cal aswell as a ood .electrical connection. G l1s an insulator@ eeve-surroun. t

Mill@ f ed bushing eng yieldable lah@ llllllilbjl" el a lic ysoclietmember; which is provided i 'ne tact C and having a portion H which slidably hts within the' socket member A. ln rear of this portion ll the sleeve is reduced in dieter to form an annular recess between the sameand the socket member, in

which is located a spring l, one end thereof abutting against the shoulder J on the sleeve andthe opposite end enga-ginga countershoulder K on the socket, preferably formed by a threaded bushing'l. L is a stop for limiting the forward movement of the bushw preferably formed by a struck-in por- -time. of thetube-A, and N is a clamping meansfor attachin the contact to the sleeve Gi, preferably 1n the form of a threcontact member an surrounding the msulated portion h` of the terminal wire..

litigi. 2, the te im wire is attachedto a mbar U which is bored and counterbored tio-receive the barcd and insulated portion -portion P at the rear end thereof forming a shoulder for enga' i one end of the bushthe counterbore in said' 4With the modied construction shown in f j .of said wire. :'lhis member@ has' a head `ingH, while the oppite end is threaded for i 'engagement with a correspondinglythreaded bushing member C having a shoul- Y, `der for engaging the sleeve and forming the central contact. With both xconstructions the terminal wire is rigidly attached tothe contact member and moves with the latter vwhen, adjusted to 4engage the lamp-.

reason of this rigid connection the .electrical circuit 'isLnot disturbed and the mechanical wearing of the parts can in no way adect ber, of a central contact member bored and counterbored and having a shouldered head ..1."'lhe combination with a socket mem-L at the opposite end from said counterbore,y

v an l ator sleeve surrounding m aber and'bearing against t eshoulderd head, said sleeve having aportion slidably said Contact v tting said socket member and a portion of' 5 reduced diameter, a bushing 5having 'a .threaded engagement with the counterbored portion of said contact member and provided, with a shoulder for wang the oplll) posite end of said sleeve, a spring surrounding the' reduced portion of said'sleevefa' stop on said socket member for -limiting the movement of said sleeve one direction, and an abutment for thespring opposed to vsaid stop.

2. The combination with an insulated terminal Wire having a bared end portion, of a member bored to receive the bared portion of said Wire and oounterbored to reoeive a portion of the insulation thereof 'Withthe counterbore vvithin said sleeve and a shoulder for7 engaging the` opposite end of said sleeve and clamping the same. l 3. The combinationl with an insulated terminal Wire having a bared end portion,o a member bored to receive the bared portion of said Wire and oounterbored to reoelve a portion of the insulation thereof, an insulator sleeve surrounding said member, and a' bushing having a threaded engagement with the counterbore Within said sleeve and coaoting With said bored member to clamp said sleeve.

4. The Combination with abored and counterbored Contact member, of a terminal Wire engaging the bore of said member, an insulatorI sleeve surrounding said member, a bushing having a threaded engagement .With the counterbored portion of said contact member and coaoting with said member to clamp said sleeve.

in testimony whereof I aiiix my signature.

' WILLAM F. ANKLAM. 

